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001-es BibID:	BIBFORM019035
Első szerző:	Mónus Ferenc
Cím:	Degree of synchronization of tree sparrows in flocks under different predation risk / Ferenc Mónus, Zoltán Barta
Dátum:	2011
ISSN:	0005-7959
Megjegyzések:	When exposed to predators animals often benefit from synchronized movements and behaviour. In this study, we investigated the level of synchronization at arrivals at and departures from a feeding platform in flock-feeding tree sparrows (Passer montanus) under two different conditions; near to a protective cover or far from it. Sparrow flocks spent 43% less time in a feeding bout, and waited 30% more between bouts, far from the cover than near to it. The relationship of vigilance and flock size was different between the two conditions; the proportion of time allocated to vigilance increased more with decreasing flock size when far from the cover than when near to it. These results suggest that sparrows perceived higher predation risk when fed farther away from the protective cover. Furthermore, we found that far from the cover arrivals of sparrows were 79% more synchronized than when close to the cover. Finally, we did not find significant difference between the two feeding conditions in the synchronization at the departure. Possibly, due to its escape function, departures may be as synchronized as possible, even when feeding near to the protective cover
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban synchronized behaviour predation risk foraging tree sparrow
Megjelenés:	Behaviour. - 148 : 5-6 (2011), p. 733-744. -
További szerzők:	Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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